Application of thermodynamic models to study micellar properties of sodium perfluoroalkyl carboxylates in aqueous solutions

被引：20
作者：
González-Pérez, A
Ruso, JM
Romero, MJ
Blanco, E
Prieto, G
Sarmiento, F
机构：
[1] Univ Santiago de Compostela, Fac Phys, Dept Appl Phys, Grp Biophys & Interfaces, E-15782 Santiago De Compostela, Spain
[2] Univ Santiago de Compostela, Fac Chem, Dept Inorgan Chem, E-15782 Santiago De Compostela, Spain
来源：
CHEMICAL PHYSICS | 2005年 / 313卷 / 1-3期
关键词：
sodium perfluoroalkyl carboxylates; critical micelle concentration; thermodynamic models;
D O I：
10.1016/j.chemphys.2005.01.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Sodium perfluoroalkyl carboxylates (CnFONa) with n = 6, 9, 10 have been studied by conductivity measurements at different temperatures. The Krafft point was determined for C9FONa and C10FONa at the highest concentration studied by measuring the temperature dependence of the specific conductivity. The critical micelle concentration (cmc) and the ionization degree of the micelle (beta) were estimated from conductivity vs. molality plots at different temperatures. Using these data and previous results on temperature dependence of cmc and beta of sodium perfluoroheptanoate and perfluorooctanoate, different models were applied to obtain the thermodynamic properties of micellization. The results are discussed in terms of alkyl chain length. (c) 2005 Elsevier B.V.. All rights reserved.
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收藏
页码：245 / 259
页数：15
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